Gavin is 9-year-old boy, a huge Seahawks fan & loves superheros like Star-Lord & Deadpool! 3 years ago he was diagnosed with cancer. His mom, dad, brother, & sister have all been affected by his diagnosis. However in early February, Gavin will complete chemo!!! Please tweet #ChrisPrattGreetGavin & help Gavin get a video from his favorite superhero to celebrate the end of chemo!